Math Flashcards
1
Q
Acuracy
A
How close a result is to actual value
- mean and median
- how close mean is to median
2
Q
Mode
A
Most frequently occurring value
- precision- ability to reproduce results
3
Q
Co-Efficient of Variation
A
Comparission of two or more results to ensure accuracy
- tech to tech, shift to shift - all tests should have the same result
- shows where something could be going wrong
4
Q
Level Jennings Chart
A
A graph that controls values against the mean + or - 3 standard deviations
5
Q
Westgards Rules
A
- If 6 or more consecutive values fall on one side of mean = SHIFT
- If 6 or more values are all increasing or decreasing= TREND
- Values must fall within +/- 2 standard deviations of the mean
6
Q
Bell Curve / Gaussian Curve
A
1s from mean - 68.2%
2s from mean - 95.4%
3s from mean - 99.6%
